Results 1 to 33 of 33
  1. #1
    mtbr member
    Reputation:
    Join Date
    Feb 2007
    Posts
    182

    Crank Brothers Egg Beater 4ti Tuning. 115gr (Carbon spring)/ 122gr (Ti spring)

    Hi,

    You may have seen the 5.97kg Cannondale Flash that S. Roth presented in the Eurobike (pics 1 and 2)...that bike had a pair of Crank Brothers EB 4ti that weighed 139.2gr. A very nice weight but we still can push the boundaries a bit more.

    This is a pic of a disassembled CB EB 4ti already tuned (pic 3) but still a bit "heavy". Basically, we have to modify every single part (weights per pedal).

    Normal weight (pic 4)

    First, we work with the main wings polishing the body and shaving the combs of the ends of the body (pics 5 and 6). 3.3gr less

    The secundary wings have not combs but polishing them we can reduce 0.5gr

    The body where the spring is placed is made of Ti and weighs 5.4gr. In light-bikes.de we can get an aluminium version(<80kg) that weighs 3.5gr/piece (pics 7 and 8). 1.9gr less

    This is the main change, the normal spring is made of steel and weighs 11.5gr. Coparni have made a carbon version with an amazing weight of 1.3gr (pics 9 and 10). 10.2gr less

    The only part that we havenīt changed is the axle. The normal one is made of Ti6Al4V, weighs 31.5gr with a length of 91.58mm. We can get a Ti6Q2 version in http://www.titaniumspindles.com that measures 88mm and weighs 28.65gr (pic 11). We reduce the Q-Factor 7.16mm and 2.85gr

    I havenīt found any pic of the bearings of these pedals but I use these of a Speedplay Zero that are about the same size. Changing the bearing body that is made of steel to a plastic one (pics 12 and 13) we reduce 2.5gr

    Next, changing the normal bearings to a Full Ceramic version (pics 14 and 15) we reduce 1gr

    The only nut of the pedal is made of steel but we can find aluminium security nuts in TorontoCycles. We reduce 1.9gr

    Finally, changing the pedal cap to a plastic one we reduce 0.9gr

    Total weight, (83-25.1)x2 = 115.8gr
    Attached Thumbnails Attached Thumbnails Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-s__roth_flash_specs.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-26.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-dsc05200.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-four_ti_166.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-k-img_4646x.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-dsc05223.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-arpjh8fi.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-dsc05435.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-federn_eggbeater_stahl.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-aa121450ba5d11de8b63bedb4d85e374.jpg  

    Last edited by Epic-o; 12-10-2009 at 03:27 PM.

  2. #2
    mtbr member
    Reputation:
    Join Date
    Feb 2007
    Posts
    182
    Last pics....

    And a video of the carbon spring:

    <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/QfJNNqpoccg&hl=es_ES&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/QfJNNqpoccg&hl=es_ES&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
    Attached Thumbnails Attached Thumbnails Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-p1000237_321.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-p1000238_206.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-img_0008_339.jpg  

    Crank Brothers Egg Beater 4ti. Extensive Tuning:115gr-img_0009_145.jpg  

    Attached Images Attached Images  

  3. #3
    mtbr member
    Reputation:
    Join Date
    Mar 2008
    Posts
    646
    and the extra cost for all of this ????

  4. #4
    gone for a bike ride
    Reputation: culturesponge's Avatar
    Join Date
    Aug 2007
    Posts
    1,973
    fantastic work Epic-o, best post here for a while

    carbon springs? simply amazing.

  5. #5
    Dirty South Underdog
    Reputation: Andrea138's Avatar
    Join Date
    Mar 2009
    Posts
    1,725
    Wow.

    I <3 this forum.
    Brickhouse Blog (most known unknown)

    Just Riding Along- best internet radio show on Mountain Bike Radio

  6. #6
    Seeeriously easy Livin
    Reputation: Flystagg's Avatar
    Join Date
    Nov 2006
    Posts
    1,864
    wow, for all the work you put into those you will be pretty sad when you bash them into a rock.

  7. #7
    Forging Elite Awesomeness
    Reputation: Upandatem's Avatar
    Join Date
    Apr 2004
    Posts
    772
    Is anyone reading that build list in the first pic?!?! Can we see pics of the whole bike or is it posted elsewhere?

  8. #8
    mtbr member
    Reputation:
    Join Date
    Oct 2006
    Posts
    115
    http://www.light-bikes.de/website/ne...robike-special

    about half way down there is a pic.


    So just by changing the springs to carbon you have a 4ti weighing less than 150g.
    How much is those carbon springs?

  9. #9
    mtbr member
    Reputation:
    Join Date
    Mar 2008
    Posts
    646
    Is there a pic of the actual completed pedals, weighed.. I dont see one....?

  10. #10
    mtbr member
    Reputation:
    Join Date
    Feb 2007
    Posts
    182
    I havenīt tuned my CB 4TI....

    I simply want to show you that these pedals have a lot of tuning potential

  11. #11
    Hack Racer
    Reputation: Cheers!'s Avatar
    Join Date
    Jun 2006
    Posts
    2,564
    Wow

  12. #12
    mtbr member
    Reputation: oldassracer's Avatar
    Join Date
    Mar 2009
    Posts
    254
    the carbon spring seems pretty weak to me
    anyone have more info?
    It is possible for rice to absorb other odors in storage. Or could be the quality of water in it was prepared. Mahatma Rice

  13. #13
    Dirty South Underdog
    Reputation: Andrea138's Avatar
    Join Date
    Mar 2009
    Posts
    1,725
    ZOMG! WANT!!

    Brickhouse Blog (most known unknown)

    Just Riding Along- best internet radio show on Mountain Bike Radio

  14. #14
    mtbr member
    Reputation: cadre's Avatar
    Join Date
    Dec 2007
    Posts
    27
    I'm speechless...

  15. #15
    mtbr member
    Reputation: morrisgarages's Avatar
    Join Date
    Jan 2009
    Posts
    449
    Does anyone know how to completely disassemble eggbeaters with regular tools? How do you get the spring out? I want to tune my 2ti. I already have Ti spindles that I got from ebay. Thanks guys.

  16. #16
    gone for a bike ride
    Reputation: culturesponge's Avatar
    Join Date
    Aug 2007
    Posts
    1,973
    Quote Originally Posted by morrisgarages
    Does anyone know how to completely disassemble eggbeaters with regular tools? How do you get the spring out? I want to tune my 2ti. I already have Ti spindles that I got from ebay. Thanks guys.
    servicing info here: http://pedaldamnit.blogspot.com/2007...servicing.html

    the spring separates from the "wings" when you tap out the inner sleeve, newer CB pedals are easier to dismantle than assemble but its worth the effort, make sure you have a rebuild kit handy as it always destroys the seals

  17. #17
    LCW
    LCW is offline
    mtbr member
    Reputation: LCW's Avatar
    Join Date
    May 2008
    Posts
    3,878
    so can those 'tuned' eggbeaters even make it through one ride before a rebuild?

    EVIL Following

    Surly Wednesday

  18. #18
    mtbr member
    Reputation: Smart Sam's Avatar
    Join Date
    Jul 2008
    Posts
    169
    Quote Originally Posted by Cheers!
    Wow
    I'll second that

  19. #19
    mtbr member
    Reputation:
    Join Date
    Feb 2007
    Posts
    182
    Quote Originally Posted by oldassracer
    the carbon spring seems pretty weak to me
    anyone have more info?
    Still a proto but...

    s.wetz@carbonschmiede.de

  20. #20
    mtbr member
    Reputation:
    Join Date
    Aug 2005
    Posts
    346
    Quote Originally Posted by culturesponge
    servicing info here: http://pedaldamnit.blogspot.com/2007...servicing.html

    the spring separates from the "wings" when you tap out the inner sleeve, newer CB pedals are easier to dismantle than assemble but its worth the effort, make sure you have a rebuild kit handy as it always destroys the seals
    Yeah but it's a bit of a ***** to get them back together without ruining the superskinny o-rings.
    I managed to put blue springs in my 4tis, but I screwed up one o-ring.

  21. #21
    mtbr member
    Reputation: oldassracer's Avatar
    Join Date
    Mar 2009
    Posts
    254
    just got confirmation of shipment of the ward industries spindles
    It is possible for rice to absorb other odors in storage. Or could be the quality of water in it was prepared. Mahatma Rice

  22. #22
    mtbr member
    Reputation: morrisgarages's Avatar
    Join Date
    Jan 2009
    Posts
    449
    Thanks for the help guys. I'll try it out first on my SL before I try it on my 2Ti. Anyone knows where I can get titanium springs for my 2ti? I'm sorry but carbon springs for my egg beaters could be pushing it. It does look too soft. I already broke a spring on my 2ti and had to send it back to CB for warranty replacement. Took them 7 months to ship it back to me.=/ I had to buy an SL while waiting for my 2ti.

  23. #23
    mtbr member
    Reputation:
    Join Date
    Feb 2007
    Posts
    182

  24. #24
    mtbr member
    Reputation: morrisgarages's Avatar
    Join Date
    Jan 2009
    Posts
    449
    Too bad I can't read german or whatever that language was.

  25. #25
    West Chester, PA
    Reputation:
    Join Date
    Sep 2006
    Posts
    3,813
    Sometimes I think this forum should be re-named "death wish".

  26. #26
    mtbr member
    Reputation:
    Join Date
    Feb 2007
    Posts
    182
    Maybe the carbon spring version is too much...we will see how it holds up

    A Ti spring version could be a bit stronger with only 7gr more...

    Here you can see the spring:

    http://www.forum.light-bikes.de/showthread.php?t=6347

  27. #27
    boom boom boooom
    Reputation: kaos42's Avatar
    Join Date
    Feb 2010
    Posts
    38
    where can i get the ceramic bearings ?

    what size is the normal bearing ? what size is the roller bearing ?

  28. #28
    mtbr member
    Reputation:
    Join Date
    Jan 2006
    Posts
    253
    Anyone know if this can be done to the Candy version? I would love to tune my 2Ti / 3Ti version. I have a few older Candy pedals that are broken and ready to some tearing apart.

  29. #29
    boom boom boooom
    Reputation: kaos42's Avatar
    Join Date
    Feb 2010
    Posts
    38
    eric52, if you have time can you measure the bearings ( outer diameter and inner hole diameter ) ?

  30. #30
    mtbr member
    Reputation: hootsmon's Avatar
    Join Date
    Feb 2008
    Posts
    762
    Quote Originally Posted by kaos42
    where can i get the ceramic bearings ?
    what size is the normal bearing ? what size is the roller bearing ?
    Hey Kaos42, I reckon I understand where you're coming from

    Regarding ceramic bearings, you can often get 'em at wholesale prices on fleaBay.
    But I gotta say I expect you'll be disappointed if you choose the ceramic option, and here's why:
    * Ceramic bearings simply don't roll any better than (say) ABEC bearings at the very low RPMs a pedal typically spins at.
    * Granted, ceramics might save a few grams, but I didn't think Candies were all that lightweight to begin with?
    * Now here's the killer; I consider those cartridge bearings are not actually the weak-link in CB's pedal design; that's because those horrible plastic sleeve bearings are the real culprit, in terms of taking most of the pedalling forces, while generating most of the friction, and also being the most failure-prone component in the whole spindle assembly.

    That's why I haven't bothered with ceramic bearings, but instead I'm looking out for a more hi-tech (ie. lower-friction & longer-lasting) alternative to the sleeve bearings.

    Just my 2 cents.
    Last edited by hootsmon; 04-14-2010 at 07:57 PM.
    Brisbane, AU

  31. #31
    boom boom boooom
    Reputation: kaos42's Avatar
    Join Date
    Feb 2010
    Posts
    38
    hootsmon, now i got just the Smarties and trying to find parts to rebuild the, i want to buy the 2 Ti next and want to start looking for replacement bearings for both

  32. #32
    mtbr member
    Reputation: loggerhead's Avatar
    Join Date
    Mar 2009
    Posts
    534
    i was thinking of getting these pedals. i don't think i need to now. just have to get all the aftermarket parts and basicly make the pedal set. i remember high zoot made a prototype carbon spring for a rear shock about 13 years ago and for whatever reason, it only stayed a prototype.

  33. #33
    mtbr member
    Reputation:
    Join Date
    Jan 2011
    Posts
    4
    I have a pair of Crank Brothers EB 4ti that need the inner wings replaced ( installed a service kit but didn't help ).

    As i need to replace parts i thought of tuning them as well to reduce a bit of weight.

    Do you know what is available and where can i buy these parts from?( green in colour )

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •